Brevity codes are designed to convey complex information with a few words or codes. Specific brevity codes include:
- Aeronautical Code signals
- ARRL Numbered Radiogram
- Multiservice tactical brevity code
- Phillips Code
- NOTAM Code
Brevity codes that are specifically designed to be used between communications operators and to support communication operations are referred to as "operating signals". These include:
- Prosigns for Morse code
- 92 Code, Western Union telegraph brevity codes
- Q code, initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio. Used since circa 1909.
- QN Signals, published by the ARRL and used by Amateur radio operators to assist in the transmission of ARRL Radiograms in the National Traffic System.
- R code, published by the British Post Office in 1908 for use only by British coastal wireless stations and ships licensed by the Postmaster General.
- S code, published by the British Post Office in 1908 for use only by British coastal wireless stations and ships licensed by the Postmaster General.
- X code, used by European military services as a wireless telegraphy code in the 1930s and 1940s
- Z code, also used in the early days of radiotelegraph communication.
Morse code, is commonly used in Amateur radio. Morse code abbreviations are a type of brevity code. Procedure words used in radiotelephony procedure, are a type of radio code. Spelling alphabets, including the ICAO spelling alphabet, are commonly used in communication over radios and telephones.